body{
    font: 0.95rem/1.5 'Microsoft Yahei', sans-serif;
    margin: 0;
    padding: 0;
    width:100%;
    height:100%;
    overflow: hidden;
}
.container{
  width: 100%;
}
.main{
    margin: auto;
    max-width: 640px;
    height: 60vh;
    margin-top: calc((100vh - 60vh)/2);
}
.main .link-item{
    text-align: center;
    padding-top: 3rem;
}
.main a{
    font-size: 1.2rem;
}
.main a:first-child{
    padding-left: 1.5rem;
}
.main a:nth-child(2){
    padding-left: 2rem;
}
.main h1{
    text-align: center;
    font-size: 8rem;
    padding-top: 1rem;
}
.main h2{
    text-align: center;
    font-size: 1.35rem;
    letter-spacing: 0.1rem;
}
@media screen and (max-width: 640px) {

}